Reduced-MHD Simulations of Toroidally and Poloidally Localized ELMs
Plasma Physics
2012-08-09 v5 Computational Physics
Fluid Dynamics
Abstract
We use the non-linear reduced-MHD code JOREK to study ELMs in the geometry of the ASDEX Upgrade tokamak. Toroidal mode numbers, poloidal filament sizes, and radial propagation speeds of filaments into the scrape-off layer are in good agreement with observations for type-I ELMs in ASDEX Upgrade. The observed instabilities exhibit a localization of perturbations which is compatible with the "solitary magnetic perturbations" recently discovered in ASDEX Upgrade [R.Wenninger et.al., Solitary Magnetic Perturbations at the ELM Onset, Nucl.Fusion, submitted]. This localization can only be described in numerical simulations with high toroidal resolution.
Keywords
Cite
@article{arxiv.1201.5765,
title = {Reduced-MHD Simulations of Toroidally and Poloidally Localized ELMs},
author = {Matthias Hoelzl and Sibylle Guenter and Ronald P. Wenninger and Wolf-Christian Mueller and Guido T. A. Huysmans and Karl Lackner and Isabel Krebs and the ASDEX Upgrade Team},
journal= {arXiv preprint arXiv:1201.5765},
year = {2012}
}
Comments
accepted for publication in Physics of Plasmas